/* ==========================================================================
   Design Tokens & System Properties
   WHY: Centralizes visual variables without heavy frameworks or CSS bloat.
   CONTRACT: Mobile-first, strict zero-use of !important, high conversion focus.
   ========================================================================== */
:root {
    --color-primary: #0284c7;
    --color-primary-hover: #0369a1;
    --color-primary-light: #e0f2fe;
    --color-secondary: #0f172a;
    --color-secondary-hover: #1e293b;
    --color-whatsapp: #16a34a;
    --color-whatsapp-hover: #15803d;
    --color-whatsapp-light: #dcfce7;
    
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-surface-alt: #f1f5f9;
    --color-border: #e2e8f0;
    --color-border-hover: #cbd5e1;

    --color-text-main: #0f172a;
    --color-text-muted: #64748b;
    --color-text-subtle: #94a3b8;
    --color-text-inverse: #ffffff;

    --font-heading: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
    --font-body: 'Inter', system-ui, -apple-system, sans-serif;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);

    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;

    --container-max: 1120px;
}

/* Base & Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    text-size-adjust: 100%;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text-main);
    font-family: var(--font-body);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1 0 auto;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.15s ease;
}

a:hover {
    color: var(--color-primary-hover);
}

img, svg {
    display: block;
    max-width: 100%;
}

/* Accessibility */
.skip-link {
    position: absolute;
    top: -100px;
    left: var(--space-md);
    background: var(--color-primary);
    color: var(--color-text-inverse);
    padding: var(--space-sm) var(--space-md);
    z-index: 1000;
    border-radius: var(--radius-sm);
    font-weight: 600;
    transition: top 0.2s;
}

.skip-link:focus {
    top: var(--space-md);
}

/* Layout Container */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-md);
    padding-right: var(--space-md);
}

/* Typography Helpers */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    color: var(--color-text-main);
    line-height: 1.25;
    font-weight: 700;
}

.text-center {
    text-align: center;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 600;
    padding: 12px 20px;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    text-align: center;
    transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
    text-decoration: none;
}

.btn:active {
    transform: translateY(1px);
}

.btn-primary {
    background-color: var(--color-whatsapp);
    color: var(--color-text-inverse);
}

.btn-primary:hover {
    background-color: var(--color-whatsapp-hover);
    color: var(--color-text-inverse);
}

.btn-secondary {
    background-color: var(--color-surface);
    color: var(--color-text-main);
    border-color: var(--color-border);
}

.btn-secondary:hover {
    background-color: var(--color-surface-alt);
    border-color: var(--color-border-hover);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-outline:hover {
    background-color: var(--color-primary-light);
}

.btn-lg {
    padding: 14px 28px;
    font-size: 1.05rem;
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn-whatsapp-header {
    background-color: var(--color-whatsapp);
    color: var(--color-text-inverse);
    padding: 8px 16px;
    font-size: 0.85rem;
    border-radius: var(--radius-full);
}

.btn-whatsapp-header:hover {
    background-color: var(--color-whatsapp-hover);
    color: var(--color-text-inverse);
}

.btn-primary-header {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    padding: 8px 16px;
    font-size: 0.85rem;
    border-radius: var(--radius-full);
}

.btn-primary-header:hover {
    background-color: var(--color-primary-hover);
    color: var(--color-text-inverse);
}

.btn-whatsapp-simple {
    background-color: var(--color-whatsapp);
    color: var(--color-text-inverse);
    padding: 10px 20px;
}

.btn-whatsapp-simple:hover {
    background-color: var(--color-whatsapp-hover);
    color: var(--color-text-inverse);
}

/* Badges */
.logo-badge {
    background-color: #fef08a;
    color: #854d0e;
    font-size: 0.72rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.hero-badge, .section-badge {
    display: inline-block;
    background-color: var(--color-primary-light);
    color: var(--color-primary);
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-sm);
}

/* Chips (Above the fold tags) */
.hero-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    margin-bottom: var(--space-lg);
}

.chip-item {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text-main);
    font-size: 0.82rem;
    font-weight: 600;
    padding: 5px 12px;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-sm);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    transition: all 0.2s ease;
}

a.chip-item:hover,
a.chip-item:focus-visible {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Header */
.site-header {
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(8px);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    color: var(--color-text-main);
}

.logo-icon {
    font-size: 1.4rem;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.15;
}

.logo-text strong {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--color-text-main);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex-shrink: 0;
}

.header-city-pill {
    display: none;
    align-items: center;
    gap: 6px;
    background-color: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    color: var(--color-text-main);
    font-size: 0.82rem;
    font-weight: 600;
    padding: 6px 12px;
    border-radius: var(--radius-full);
}

.pulse-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--color-whatsapp);
}

/* Header Navigation (ADR-005) */
.header-nav {
    display: none;
}

.nav-list {
    list-style: none;
    display: flex;
    margin: 0;
    padding: 0;
}

.nav-link {
    color: var(--color-text-main);
    font-family: var(--font-heading);
    font-size: 0.88rem;
    font-weight: 600;
    text-decoration: none;
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    transition: color 0.15s ease, background-color 0.15s ease;
}

.nav-link:hover, .nav-link:focus-visible {
    color: var(--color-primary);
    background-color: var(--color-surface-alt);
    outline: none;
}

/* Scalable Header Dropdown (ADR-005) */
.nav-item-dropdown {
    position: relative;
}

.nav-dropdown-toggle {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: transparent;
    border: none;
    cursor: pointer;
    font-family: var(--font-heading);
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--color-text-main);
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    transition: color 0.15s ease, background-color 0.15s ease;
}

.nav-dropdown-toggle:hover,
.nav-dropdown-toggle:focus-visible {
    color: var(--color-primary);
    background-color: var(--color-surface-alt);
    outline: none;
}

.dropdown-arrow {
    font-size: 0.72rem;
    transition: transform 0.2s ease;
}

.nav-item-dropdown.is-open .dropdown-arrow {
    transform: rotate(180deg);
}

.nav-dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 250px;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 6px 0;
    margin: 4px 0 0 0;
    list-style: none;
    z-index: 120;
}

.nav-item-dropdown.is-open .nav-dropdown-menu {
    display: block;
}

.dropdown-item a {
    display: block;
    padding: 10px 16px;
    font-family: var(--font-heading);
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--color-text-main);
    text-decoration: none;
    transition: background-color 0.15s ease, color 0.15s ease;
}

.dropdown-item a:hover,
.dropdown-item a:focus-visible {
    background-color: var(--color-surface-alt);
    color: var(--color-primary);
    outline: none;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    padding: 4px;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    flex-shrink: 0;
    transition: background-color 0.15s ease, border-color 0.15s ease;
}

.mobile-menu-toggle:hover {
    background-color: var(--color-surface-alt);
    border-color: var(--color-border-hover);
}

.mobile-menu-toggle:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.hamburger-bar {
    width: 20px;
    height: 2px;
    background-color: var(--color-text-main);
    border-radius: 2px;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

/* Mobile Menu Expanded State */
.site-header.nav-open .header-nav {
    display: block;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--color-surface);
    border-bottom: 2px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    padding: var(--space-md) var(--space-md);
    z-index: 100;
}

.site-header.nav-open .nav-list {
    flex-direction: column;
    gap: 6px;
}

.site-header.nav-open .nav-link {
    display: block;
    padding: 12px 16px;
    font-size: 0.95rem;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
}

.site-header.nav-open .nav-link:hover,
.site-header.nav-open .nav-link:focus-visible {
    background-color: var(--color-surface-alt);
    border-color: var(--color-border);
}

.site-header.nav-open .nav-dropdown-toggle {
    display: none;
}

.site-header.nav-open .nav-item-dropdown .nav-dropdown-menu {
    display: flex;
    flex-direction: column;
    gap: 6px;
    position: static;
    box-shadow: none;
    border: none;
    padding: 0;
    margin: 0;
    background: transparent;
}

.site-header.nav-open .nav-item-dropdown .dropdown-item a {
    display: block;
    padding: 12px 16px;
    font-size: 0.95rem;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
}

.site-header.nav-open .nav-item-dropdown .dropdown-item a:hover,
.site-header.nav-open .nav-item-dropdown .dropdown-item a:focus-visible {
    background-color: var(--color-surface-alt);
    border-color: var(--color-border);
}

.site-header.nav-open .mobile-menu-toggle .hamburger-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.site-header.nav-open .mobile-menu-toggle .hamburger-bar:nth-child(2) {
    opacity: 0;
}

.site-header.nav-open .mobile-menu-toggle .hamburger-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Breadcrumbs */
.breadcrumb-nav {
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-sm) 0;
    font-size: 0.82rem;
}

.breadcrumb-list {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    list-style: none;
    gap: var(--space-xs);
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    color: var(--color-text-muted);
}

.breadcrumb-item + .breadcrumb-item::before {
    content: "/";
    margin: 0 var(--space-xs);
    color: var(--color-text-subtle);
}

.breadcrumb-item a {
    color: var(--color-text-muted);
}

.breadcrumb-item.active span {
    color: var(--color-text-main);
    font-weight: 600;
}

/* Sections */
.section {
    padding-top: var(--space-2xl);
    padding-bottom: var(--space-2xl);
}

.bg-alt {
    background-color: var(--color-surface-alt);
}

.section-header {
    margin-bottom: var(--space-xl);
}

.section-title {
    font-size: 1.75rem;
    margin-bottom: var(--space-xs);
}

.section-subtitle {
    color: var(--color-text-muted);
    font-size: 1rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Hero */
.hero-section, .city-hero-section, .service-hero-section {
    background: linear-gradient(180deg, #ffffff 0%, var(--color-bg) 100%);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-2xl) 0 var(--space-3xl);
}

.hero-inner {
    text-align: center;
}

.hero-content {
    max-width: 780px;
    margin-left: auto;
    margin-right: auto;
}

.location-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background-color: #fef3c7;
    color: #92400e;
    font-size: 0.82rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-sm);
}

.hero-title {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    margin-bottom: var(--space-md);
    color: var(--color-secondary);
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-xl);
    line-height: 1.5;
}

.hero-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-xl);
}

.chip-item {
    display: inline-block;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    padding: 6px 14px;
    font-size: 0.85rem;
    color: var(--color-text);
    font-weight: 600;
    box-shadow: var(--shadow-sm);
}

.hero-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    align-items: center;
    justify-content: center;
}

.hero-text-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--color-text-muted);
    font-size: 0.88rem;
    font-weight: 500;
    text-decoration: underline;
    text-underline-offset: 3px;
    margin-top: 2px;
    transition: color 0.15s ease;
}

.hero-text-link:hover,
.hero-text-link:focus-visible {
    color: var(--color-primary);
}

/* Intro Pillars */
.intro-box {
    max-width: 960px;
    margin: 0 auto;
}

.intro-pillars-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
    margin-top: var(--space-xl);
}

.pillar-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.pillar-icon {
    font-size: 1.8rem;
    margin-bottom: var(--space-xs);
}

.pillar-title {
    font-size: 1.1rem;
    margin-bottom: var(--space-xs);
}

.pillar-desc {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* City Cards */
.city-cards-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    max-width: 540px;
    margin: 0 auto;
}

.city-card {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-md);
    text-align: left;
    display: flex;
    flex-direction: column;
}

.city-card-header {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: var(--space-sm);
}

.city-status-badge {
    align-self: flex-start;
    background-color: var(--color-whatsapp-light);
    color: var(--color-whatsapp-hover);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: var(--radius-full);
}

.city-card-title {
    font-size: 1.4rem;
}

.city-card-desc {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    margin-bottom: var(--space-lg);
    flex-grow: 1;
}

/* Category Grid (Home) */
.category-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
}

.category-card {
    background-color: var(--color-surface);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    display: flex;
    flex-direction: column;
}

.category-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.category-icon {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
}

.category-title {
    font-size: 1.15rem;
    margin-bottom: var(--space-xs);
}

.category-desc {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    flex-grow: 1;
    margin-bottom: var(--space-md);
}

/* Services Grid (City Hub) */
.services-cards-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
}

.service-card {
    background-color: var(--color-surface);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.service-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.service-icon-wrap {
    font-size: 1.8rem;
    margin-bottom: var(--space-sm);
}

.service-card-title {
    font-size: 1.15rem;
    margin-bottom: var(--space-xs);
}

.service-card-desc {
    font-size: 0.88rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-md);
    flex-grow: 1;
}

.service-card-cta {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--color-primary);
}

/* Steps (Workflow) */
.steps-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
}

.step-card {
    background-color: var(--color-surface);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
}

.step-number {
    width: 44px;
    height: 44px;
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-md);
}

.step-title {
    font-size: 1.15rem;
    margin-bottom: var(--space-xs);
}

.step-desc {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    flex-grow: 1;
}

/* Scope Box */
.scope-box {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    max-width: 800px;
    margin: 0 auto;
    box-shadow: var(--shadow-sm);
}

.scope-checklist {
    list-style: none;
    margin-top: var(--space-md);
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    color: var(--color-text-main);
    font-weight: 500;
}

/* FAQ */
.faq-list {
    max-width: 740px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.faq-item {
    background-color: var(--color-surface);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
}

.faq-question {
    font-size: 1.05rem;
    margin-bottom: var(--space-xs);
    color: var(--color-secondary);
}

.faq-answer {
    font-size: 0.92rem;
    color: var(--color-text-muted);
    line-height: 1.55;
}

/* CTA Section */
.cta-section {
    padding: var(--space-2xl) 0;
}

.cta-card {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: var(--color-text-inverse);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl) var(--space-lg);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.cta-content {
    max-width: 680px;
    margin: 0 auto;
}

.cta-badge {
    display: inline-block;
    background-color: rgba(255, 255, 255, 0.15);
    color: #fef08a;
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-sm);
}

.cta-title {
    color: var(--color-text-inverse);
    font-size: 1.85rem;
    margin-bottom: var(--space-sm);
}

.cta-subtitle {
    color: #cbd5e1;
    font-size: 1rem;
    margin-bottom: var(--space-xl);
}

.cta-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    justify-content: center;
    align-items: center;
    margin-bottom: var(--space-lg);
}

.cta-channel-note {
    margin-bottom: var(--space-md);
    font-size: 0.88rem;
    color: #94a3b8;
}

.cta-trust-points {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    justify-content: center;
    font-size: 0.85rem;
    color: #94a3b8;
}

/* 404 Error */
.error-section {
    padding: var(--space-3xl) 0;
    text-align: center;
}

.error-card {
    max-width: 600px;
    margin: 0 auto;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl) var(--space-lg);
    box-shadow: var(--shadow-md);
}

.error-badge {
    display: inline-block;
    background-color: #fee2e2;
    color: #dc2626;
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-md);
}

.error-title {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
}

.error-desc {
    color: var(--color-text-muted);
    margin-bottom: var(--space-xl);
}

.error-actions {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-bottom: var(--space-2xl);
}

.error-help {
    border-top: 1px solid var(--color-border);
    padding-top: var(--space-lg);
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.error-help p {
    margin-bottom: var(--space-sm);
}

/* Footer */
.site-footer {
    background-color: var(--color-secondary);
    color: #cbd5e1;
    border-top: 1px solid #334155;
    padding-top: var(--space-3xl);
    font-size: 0.9rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--color-text-inverse);
    font-size: 1.1rem;
    margin-bottom: var(--space-sm);
}

.footer-desc {
    color: #94a3b8;
    line-height: 1.5;
}

.footer-heading {
    color: var(--color-text-inverse);
    font-size: 1rem;
    margin-bottom: var(--space-md);
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-links a {
    color: #cbd5e1;
}

.footer-links a:hover {
    color: var(--color-text-inverse);
}

.footer-contact-item {
    color: #94a3b8;
    margin-bottom: var(--space-xs);
}

.footer-bottom {
    border-top: 1px solid #1e293b;
    padding: var(--space-lg) 0;
    font-size: 0.82rem;
    color: #64748b;
}

.footer-bottom-inner {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    text-align: center;
}

/* Service Spotlight (e.g. Wardrobe Deep-Dive) */
.spotlight-box {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
}

.spotlight-content .section-title {
    margin-bottom: var(--space-sm);
}

.spotlight-content > p {
    color: var(--color-text-muted);
    font-size: 1.05rem;
    line-height: 1.6;
    margin-bottom: var(--space-xl);
}

.spotlight-points-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
}

.spotlight-point {
    background-color: var(--color-bg-alt);
    border-radius: var(--radius-md);
    padding: var(--space-md) var(--space-lg);
    border-left: 3px solid var(--color-primary);
}

.spotlight-point h4 {
    font-size: 1.05rem;
    color: var(--color-text);
    margin-bottom: 6px;
}

.spotlight-point p {
    font-size: 0.92rem;
    color: var(--color-text-muted);
    line-height: 1.5;
}

/* Disassembly Section */
.disassembly-box {
    max-width: 960px;
    margin: 0 auto;
}

.disassembly-text .section-title {
    margin-bottom: var(--space-sm);
}

.disassembly-text > p {
    color: var(--color-text-muted);
    font-size: 1.05rem;
    line-height: 1.6;
    margin-bottom: var(--space-lg);
}

/* Bridge and Hub Return */
.city-hub-bridge {
    margin-top: var(--space-lg);
    padding: var(--space-md) var(--space-lg);
    background-color: var(--color-surface);
    border-radius: var(--radius-md);
    border: 1px dashed var(--color-border);
    font-size: 0.95rem;
}

.hub-back-banner {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
}

.hub-back-banner p {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.88rem;
}

/* Responsive Media Queries (Mobile First) */
@media (min-width: 640px) {
    .header-city-pill {
        display: inline-flex;
    }

    .hero-actions, .cta-actions, .error-actions {
        flex-direction: row;
    }

    .intro-pillars-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .category-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .services-cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .steps-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .spotlight-points-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 768px) {
    .hero-title {
        font-size: 2.6rem;
    }

    .section-title {
        font-size: 2.1rem;
    }

    .footer-grid {
        grid-template-columns: 2fr 1fr 1.5fr;
    }

    .footer-bottom-inner {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
}

@media (min-width: 1024px) {
    .category-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .services-cards-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Related Services (ADR-005) */
.related-services-section {
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.related-services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.related-service-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
    transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.related-service-card:hover {
    transform: translateY(-2px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.related-card-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-xs);
}

.related-card-icon {
    font-size: 1.6rem;
}

.related-card-title {
    font-size: 1.15rem;
    color: var(--color-text-main);
}

.related-card-desc {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.5;
    margin-bottom: var(--space-lg);
    flex-grow: 1;
}

.related-hub-bridge {
    margin-top: var(--space-md);
}

/* Service Card Status / Info for Consultative Services */
.service-badge-planned {
    display: inline-block;
    background-color: var(--color-surface-alt);
    color: var(--color-text-muted);
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 3px 8px;
    border-radius: var(--radius-full);
    border: 1px solid var(--color-border);
    margin-top: var(--space-xs);
}

.service-card-info {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    font-style: italic;
    margin-top: var(--space-xs);
}

/* Utility Helpers */
.mt-2 { margin-top: var(--space-sm); }
.mb-5 { margin-bottom: var(--space-2xl); }

/* Responsive Media Query for Header Navigation & Related Services */
@media (max-width: 639px) {
    .btn.btn-primary-header,
    .btn.btn-whatsapp-header {
        display: none;
    }
    .logo-text strong {
        font-size: 0.92rem;
    }
    .hero-title {
        font-size: 1.65rem;
        line-height: 1.2;
    }
    .btn-lg {
        padding: 12px 18px;
        font-size: 0.95rem;
    }
}

@media (min-width: 640px) {
    .related-services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 992px) {
    .header-nav {
        display: flex;
        align-items: center;
    }

    .nav-list {
        display: flex;
        flex-direction: row;
        align-items: center;
        gap: 4px;
    }

    .mobile-menu-toggle {
        display: none;
    }

    .related-services-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ==========================================================================
   Custom Service Request Component & Utility Styles
   WHY: Distinct visual representation for transversal custom requests,
        ensuring user never feels limited to catalogued SEO services.
   ========================================================================== */
.custom-hero-section {
    background: linear-gradient(180deg, #f8fafc 0%, #edf2f7 100%);
    padding: var(--space-2xl) 0 var(--space-xl);
    border-bottom: 1px solid var(--color-border);
}

.custom-request-section {
    padding: var(--space-2xl) 0;
}

.custom-request-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    max-width: 960px;
    margin: 0 auto;
}

@media (min-width: 992px) {
    .custom-request-layout {
        grid-template-columns: 1.5fr 1fr;
        align-items: start;
    }
}

.custom-request-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
}

.card-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-primary);
    background: var(--color-primary-light);
    padding: 4px 10px;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-xs);
}

.card-title {
    font-size: 1.4rem;
    color: var(--color-text-main);
    margin-bottom: var(--space-xs);
    font-weight: 700;
}

.card-subtitle {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
    line-height: 1.5;
}

/* Accessible Form Styles */
.custom-request-form {
    display: flex;
    flex-direction: column;
}

.form-group {
    margin-bottom: var(--space-md);
}

.form-label {
    display: block;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--color-text-main);
    margin-bottom: var(--space-xs);
}

.form-label .required {
    color: #dc2626;
    font-weight: 700;
}

.form-textarea {
    width: 100%;
    padding: 14px 16px;
    font-family: inherit;
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--color-text-main);
    background: var(--color-surface);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    resize: vertical;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
    box-sizing: border-box;
}

.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

.form-textarea.has-error {
    border-color: #ef4444;
}

.form-textarea.has-error:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

.form-hint {
    font-size: 0.82rem;
    color: var(--color-text-muted);
    margin-top: 6px;
    line-height: 1.4;
}

.form-privacy-note {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.82rem;
    color: var(--color-text-muted);
    background: var(--color-surface-alt);
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    margin: var(--space-sm) 0 var(--space-lg);
}

.privacy-icon {
    font-size: 1rem;
    flex-shrink: 0;
}

/* Accessible Alert Messages */
.form-alert {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    padding: 14px 16px;
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
    font-size: 0.92rem;
    line-height: 1.5;
}

.form-alert-error {
    background-color: #fef2f2;
    border: 1px solid #fecaca;
    color: #991b1b;
}

.form-alert-info {
    background-color: #f8fafc;
    border: 1px solid #cbd5e1;
    color: #334155;
}

.form-alert-success {
    background-color: #f0fdf4;
    border: 1px solid #bbf7d0;
    color: #166534;
}

.form-alert .alert-icon {
    font-size: 1.2rem;
    flex-shrink: 0;
    line-height: 1;
}

.form-alert .alert-content strong {
    display: block;
    margin-bottom: 2px;
}

.custom-request-footer {
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
}

.back-link-text {
    font-size: 0.88rem;
    color: var(--color-text-muted);
}

/* Sidebar Styles */
.sidebar-box {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
}

.sidebar-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-text-main);
    margin-bottom: var(--space-md);
    border-bottom: 1px solid var(--color-border);
    padding-bottom: var(--space-sm);
}

.sidebar-steps {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.sidebar-steps li {
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.step-num {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--color-primary-light);
    color: var(--color-primary);
    font-weight: 700;
    font-size: 0.88rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.sidebar-steps li strong {
    display: block;
    font-size: 0.95rem;
    color: var(--color-text-main);
}

.sidebar-steps li p {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin: 2px 0 0;
    line-height: 1.4;
}

.sidebar-notice {
    margin-top: var(--space-md);
    padding: var(--space-md);
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    color: var(--color-text-muted);
    line-height: 1.5;
}

.notice-badge {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-secondary);
    margin-bottom: var(--space-xs);
}

/* ==========================================================================
   Custom Service Banner (Hub & Home Alternative Callout)
   WHY: Distinct visual block after services catalog; ensures user clearly
        distinguishes custom requests from catalogued SEO service cards.
   ========================================================================== */
.custom-service-banner {
    background: linear-gradient(135deg, #f0fdf4 0%, #eff6ff 100%);
    border: 1.5px solid #bfdbfe;
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin-top: var(--space-2xl);
    box-shadow: var(--shadow-sm);
    text-align: center;
}

.custom-service-banner-inner {
    max-width: 720px;
    margin: 0 auto;
}

.custom-service-banner .banner-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #1d4ed8;
    background: #dbeafe;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-sm);
}

.custom-service-banner .banner-title {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-text-main);
    margin-bottom: var(--space-xs);
}

.custom-service-banner .banner-desc {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
    line-height: 1.5;
}

.custom-service-banner .banner-actions {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

/* Discrete Bridge on Specific Service Pages */
.custom-service-bridge {
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px dashed var(--color-border);
    text-align: center;
}

.custom-service-bridge-text {
    font-size: 0.92rem;
    color: var(--color-text-muted);
    margin-bottom: 6px;
}

.custom-service-bridge-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--color-primary);
    padding: 6px 14px;
    border-radius: var(--radius-md);
    transition: background 0.15s ease, color 0.15s ease;
}

.custom-service-bridge-link:hover {
    background: var(--color-primary-light);
    color: var(--color-primary-hover);
}


 0.15s ease;
}

.custom-service-bridge-link:hover {
    background: var(--color-primary-light);
    color: var(--color-primary-hover);
}